The Andean vesper mouse lives in high-elevation grasslands at 3,300–5,000 m.
Its dense coat is gray-brown on the back, darker toward the tail, and lighter brown on the flanks. The belly and cheeks are white or gray; the short tawny tail is about 30% of total length.
It occurs in high-altitude grassland; the reported elevation range is 3,300–5,000 m.
An extinction-risk assessment has not been added yet.